/Engine/Source/Editor/UnrealEd/Public/GraphEditor.h
Info about events occurring in/on the graph
struct FGraphEditorEvents
FOnCreateAction...
OnCreateActionMenu
Called to create context menu for right clicking in empty area
FOnCreateNodeOr...
OnCreateNodeOrPinMenu
Called to create context menu for right clicking a node or pin, same parameters as GetContextMenuActions on schema
FOnDisallowedPi...
OnDisallowedPinConnection
Called when the user generates a warning tooltip because a connection was invalid
FOnDoubleClicke...
OnDoubleClicked
Called when the graph itself is double clicked
FOnDropActor
OnDropActor
Called when an actor is dropped on graph
FOnDropStreamin...
OnDropStreamingLevel
Called when a streaming level is dropped on graph
FOnFocused
OnFocused
Called when focus moves to graph
FOnMouseButtonD...
OnMouseButtonDown
Called when the graph is clicked
FSingleNodeEven...
OnNodeDoubleClicked
Called when a node is double clicked
FOnNodeSingleCl...
OnNodeSingleClicked
Called when a node is single-clicked without drag
FOnNodeSpawnedB...
OnNodeSpawnedByKeymap
Called when a keymap spawns a node
FOnSelectionCha...
OnSelectionChanged
Called when selection changes
FOnSpawnNodeByS...
OnSpawnNodeByShortcut
Called to spawn a node in the graph using a shortcut
FOnNodeTextComm...
OnTextCommitted
Called when text is committed on the graph
FOnNodeVerifyTe...
OnVerifyTextCommit
Called when text is being committed on the graph to verify